If you are using uniapp to develop an application and want to reference echarts for data visualization display, but find that no matter how hard you try, the echarts chart cannot be displayed normally, then you may need to perform the following debugging steps:
- Confirm whether echarts is imported correctly
Before using echarts, you need to import the js file of echarts first. You can add the following code to index.html to try to introduce it:
<script></script>
If your project does not use CDN, you need to download the js file of echarts and introduce it into the project. Make sure the path to the echarts.js file is correct, and also confirm whether echarts.js exports the echarts object.
- Confirm whether the container is set up
In uniapp, you can use the provided components to create a container to place echarts. Before using echarts, you need to define a container.
The following is an example:
<template> <view> <ec-canvas></ec-canvas> </view> </template>
Among them, <ec-canvas></ec-canvas>
is a built-in component of uniapp for placing charts. You need to specify an id within the component, which will be used for subsequent initialization operations.
- Initialize echarts
After creating the container, you need to initialize echarts in the js code. Data and configuration items need to be specified in the initialization code, and the chart is rendered in the container defined previously.
The following is an example:
import * as echarts from 'echarts'; export default { onLoad() { this.initChart(); }, methods: { initChart() { this.$nextTick(() => { const ec = this.$refs['chart-dom'].ref; const chart = echarts.init(ec, null, { width: this.getDomWidth('chart'), height: this.getDomHeight('chart') }); let option = { title: { text: '统计图表' }, ... // 其他配置项 }; chart.setOption(option); }); } } }
In this example, the $nextTick function of uniapp is used to ensure that the initialization of echarts will be executed after the chart-dom element is rendered and the chart- The method of dom element is this.$refs['chart-dom'].ref
. You can also use other methods to obtain DOM elements for initialization.
- Confirm whether the data is correct
If there are no problems with the previous steps, but the echarts chart still cannot be displayed normally, then it is very likely that there is a problem with the data. It is necessary to confirm whether the data is correct and whether the specific rendered data matches.
To sum up, if you encounter the problem that the echarts referenced in uniapp are not displayed, you can first focus on the above points to troubleshoot.
The above is the detailed content of What should I do if echarts referenced by uniapp is not displayed?. For more information, please follow other related articles on the PHP Chinese website!

This article details uni-app's local storage APIs (uni.setStorageSync(), uni.getStorageSync(), and their async counterparts), emphasizing best practices like using descriptive keys, limiting data size, and handling JSON parsing. It stresses that lo

This article details workarounds for renaming downloaded files in UniApp, lacking direct API support. Android/iOS require native plugins for post-download renaming, while H5 solutions are limited to suggesting filenames. The process involves tempor

This article addresses file encoding issues in UniApp downloads. It emphasizes the importance of server-side Content-Type headers and using JavaScript's TextDecoder for client-side decoding based on these headers. Solutions for common encoding prob

This article details making and securing API requests within uni-app using uni.request or Axios. It covers handling JSON responses, best security practices (HTTPS, authentication, input validation), troubleshooting failures (network issues, CORS, s

This article details uni-app's geolocation APIs, focusing on uni.getLocation(). It addresses common pitfalls like incorrect coordinate systems (gcj02 vs. wgs84) and permission issues. Improving location accuracy via averaging readings and handling

This article compares Vuex and Pinia for state management in uni-app. It details their features, implementation, and best practices, highlighting Pinia's simplicity versus Vuex's structure. The choice depends on project complexity, with Pinia suita

The article details how to integrate social sharing into uni-app projects using uni.share API, covering setup, configuration, and testing across platforms like WeChat and Weibo.

This article explains uni-app's easycom feature, automating component registration. It details configuration, including autoscan and custom component mapping, highlighting benefits like reduced boilerplate, improved speed, and enhanced readability.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Atom editor mac version download
The most popular open source editor
